Anyone get worse gas mileage with SPDs y-pipe?
#1
Anyone get worse gas mileage with SPDs y-pipe?
Well i finally got the new y-pipe put one. And i was hope for a little better of something. Hell anything better. Instead everything is worse.
I know how a lot more flutter noise than before. And i am now getting worse gas mileage.
I run a lawn care biz and towing a 7,000lb trailer around town all day. Which i know is bad enough. But i normally got between 7.5mpg to 8.5mpg.
Now after the new y-pipe im getting 6.1mpg. And it even went down to 4.8mpg one time. I have tried different octane fuel and changing driving style a little. But nothing helped.
Has anyone had anything like this before? If this is the real problem then im going back to stock y-pipe.
Oh and my truck is a 99 f250. Aftermarket headers and series 40 muffler.
I know how a lot more flutter noise than before. And i am now getting worse gas mileage.
I run a lawn care biz and towing a 7,000lb trailer around town all day. Which i know is bad enough. But i normally got between 7.5mpg to 8.5mpg.
Now after the new y-pipe im getting 6.1mpg. And it even went down to 4.8mpg one time. I have tried different octane fuel and changing driving style a little. But nothing helped.
Has anyone had anything like this before? If this is the real problem then im going back to stock y-pipe.
Oh and my truck is a 99 f250. Aftermarket headers and series 40 muffler.
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#6
The y-pipe should not affect fuel mileage at all, if anything make it better. I'd make shure no O2 wires are still in good shape and were not damaged. Clean the MAF, replace the fuel filter if its due along with the air filter and reset the computer. The truck should relearn regardless but reset the computer anyway. Disconnect the battery lead and turn the headlight switch on for a little to bleed any excess voltage. Reconnect the to the battery and your trucks reset.
#7
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#8
Yea i knew that. But i was hoping for anything better. Figured i was doing the headers might as well do the y-pipe.
Not to mention now the dang thing sounds like an old farm tractor.
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#12
I had massive exhaust leaks on both sides before I did the manifold bolts and gaskets. I thought this may make a bit of a difference.
Nope. Same milage and I just got back form a trip towing the travel trailer.
#13
I had some of the same problem when I installed the SPD y pipe. My 2000 X went from sounding like a high reving race engine to a 6 cylinder farm truck. I did not see any noticable gas mileage increase the power seems to be slightly improved but it takes it longer to get there than before. If I had it to do over again I would have left it alone. Two questions, I just assumed that my factory rams horn had the restritors in it, could it not had, I did not get to look at it before the muffler guy tossed it. If it did not have the restrictors where could I get another one to replace the SPD? Thanks for the help.
#14
I had some of the same problem when I installed the SPD y pipe. My 2000 X went from sounding like a high reving race engine to a 6 cylinder farm truck. I did not see any noticable gas mileage increase the power seems to be slightly improved but it takes it longer to get there than before. If I had it to do over again I would have left it alone. Two questions, I just assumed that my factory rams horn had the restritors in it, could it not had, I did not get to look at it before the muffler guy tossed it. If it did not have the restrictors where could I get another one to replace the SPD? Thanks for the help.
#15